That is so sad. I watched that baby hatch, get delicately fed tiny pieces of meat by huge parents, quickly grow into a huge eagle exercising her wings. I watched those amazing parents take such good care of their three babies through snow storms, and high winds. There is a great video of mom in the nest with her nearly full size babies during a sudden downpour. All three babies start flapping their wings and the same time. Mom is getting bashed from all sides and getting soaking wet. She patiently stays until the rain lets up.
It was good to hear the power poles were quickly fixed so other birds don't suffer the same fate.